Process of mercerizing.



n l To: KTEFTW'Wl will lilies Allllllll? E. SlvlITH AND JOSEPH K. MlLLlKEN, OF DlG-HTON, MASSACHUSETTS.

PBQGESS OF ZMGERCERIEENG.

Pmplioetiou filed (lo-lobe)" 1966.

Fri

.1 u all 11:7". om it may, comem:

Be 1i and 305i .lsliLLn-zim, citizens o? the residing at Illigliloii, in the l mill t'ts, he nleil oolteiu new and useful improvements in l liileroeyizii'ig ibrous Cellulose which ivlie iollowiug e, soeoi'lio :1.

EV have discovezred Zia-t e. memorized product of superior lust sfirenglli. sud irenspei'euce 12mg." produced by subjecting; (iorous eellulose mo :iisls i0 the eosion of a. smile solution of mseose, either before or during "Iie Ollllilzlly process of meroerizetiou by enoillmli solution.

For the preparation of the crude visoos'e soluc-io?- ounees of cotton Wool are ti'eeteo for twenty-four hours with 500 es. of an slqueous sodium hydZOXld solution 21 ounces of carbon 'liisulfid ere il'ien added. and thoroughly mixed in and the mixture allowed so slsucl in e tight receptools for four hours. i The resulting gum is dissolved. by eovei'iiig it with Water and allow it to sieud twelve hours and enou li Will/81 is thou eclded to make 2 gallons of t 1e solution. constitutes our solution of crude viscose.

in the lf'lall'ii. mode of procedure, e ual 7 parts of me crude viscose solution and 0' an aqueous sodium liydi'oxid solution bovin a. density of 45 Tw. are mixed.' The so ulose libel, yarn or fabric, in. e; stretched. con ditiou, is subjected to the action of llie mixture for, say three minutes, and is then mercelizecl as usual, for example by treating it villi on equeous sodium liydi'ox'ul solution of 78" To. It is then washed with Water and neutralized by u dilute filliLl solution.

.. 1 A in the alternative mode or procedure, one

pen; of i-lie'oruilo viscose solution is mixed Specification of Leficers Pal/out.

fiei'iel No. 339.9%. (Syeoimenm) Pafiented June 2, mos.

with twoperts of the ordinary memorizing solution, to filiain aqueous sodium hydroxid solutionof 7 0 'lw. and the mixtui'e is employe-(l as o, meroerizhg reagent, in place of she simple ellmli bath, the goods being trout ed in e stretched condition, washed and neutralized.

The improved physical results elleotecl by this process are believed lobe due to the ex:- treme hydration of the cellulose fiber, due to the action. of the concentrated alkali on the cellulose in the pi'e'senee of the crude viscose the hyclmte groups in "viscose being s ver active chemical eondibion and the erode viscose solution eonlsiuin in excess of the amount required to reaeiu the viscose in solution. The carbon 'leisulfiil in the crude viscose solution may else upon the cellulose to form thiooerboueies.

We claim: I

1. In the process of memorizing fibrous cellulose materials, ti'eetiug the unmeroeu ized material with the crude solution produced by reacting on cellulose with an alkali and carbon bisuliixl, and with en elkeli.

2. in the process of mei'oeriziug fibrous cellulose materials, tieuuii'ig the uumeioei ized material with e crude Viscose solution and with an alkali.

3. In the process oi memorizing fibrous cellulose materials, treating the material sueoessively with a. crude solution of viscose and with an alkali.

In testimony whereof. We ellix. our signstures in presence of two Witnesses.

- ALBERT E. SMITH. i JOSEPH K. MILLXKEN.

" i Witnesses:

502m A. LEWIS, CHAS. R. Bmoes.

ss byprocluols. 'brithio-eerloonsizes and ellm -lirtluooerbouetes' 

